Glass Cleaning; Cleaning Out The Ashes; Cleaning The Flue; Calculation Of The Thermal Power - Nordica VIOLETTA Anweisungen

VIOLETTA / GIULIETTA / ISETTA 07 / ISOTTA EVO / VIOLA / ISOTTA FORNO

12.7. GLASS CLEANING

Thanks to a speciic inlet of secondary air, the accumulation of dirty sediments on the glass-door is reduced with eficacy. Nevertheless this
can never be avoided by using solid fuels ( particularly wet wood ) and it has not to be understood as a defect of the appliance.
IMPORTANT: The cleaning of the sight glass must be carried out only and exclusively with cold device to avoid the explosion of
the same. For the cleaning, it is possible to use speciic products or a wet newspaper paper ball passed in the ash to rub it. Do not
use cloths, abrasive or chemically aggressive products by cleaning the hearth glass.
The correct lighting phase, the use of proper quantities and types of fuels, the correct position of the secondary air regulator, enough
draught of the chimney-lue and the presence of combustion air are the essential elements for the optimal functioning of the appliance and
for the cleaning of the glass.
BREAK OF GLASSES: Given that the glass-ceramic glasses resist up to a heat shock of 750°C, they are not subject to thermal
shocks. Their break can be caused only by mechanic shocks (bumps or violent closure of the door, etc.). Therefore, their
replacement is not included in the warranty.

12.8. CLEANING OUT THE ASHES

All the devices are equipped with a hearth grating and an ash drawer for the collection of the ashes
It is suggested to empty periodically the ash drawer and to avoid it ills completely in order not to overheat the grating. Moreover, it is
suggested to leave always 3-4 cm of ash in the hearth.
CAUTION: The ashes removed from the hearth have to be stored in a container made of ire-resistant material equipped with an
air-tight cover. The container has to be placed on a ire-resistant loor, far from lammable materials up to the switching off
and complete cooling.

12.9. CLEANING THE FLUE

The correct lighting phase, the use of proper quantities and types of fuels, the correct position of the secondary air regulator, enough
draught of the chimney-lue and the presence of combustion air are the essential elements for the optimal functioning of the appliance.
The device should be completely cleaned at least once a year or every time it is needed (in case of bad working and low yield). An
excessive deposit of soot can cause problems in the discharge of smokes and ire in the lue.
The cleaning must be carried out exclusively with cold equipment. This operation should be carried out by a chimney sweeper who
can simultaneously perform an audit of the lue (checking of possible deposits).

13. CALCULATION OF THE THERMAL POWER

There is not an absolute rule for calculating the correct necessary power. This power is given according to the space to be heated, but it
depends also largely on the insulation. On an average, the caloriic value necessary for a properly insulated room is 30 kcal/h per m
an external temperature of 0°C).
Given that 1 kW corresponds to 860 kcal/h, it is possible to adopt a value of 38 W/m
Let's suppose one wishes to heat a room of 150 m
x 38 W/m = 5700 W or 5,7 kW. As main heating, a 8 kW device is therefore suficient.
3
Fuel
Dry wood (15% humidity)
Wet wood (50% humidity)
Wood briquettes
Brown coal briquettes
Normal anthracite
Coke
Natural gas
Naphtha
Electricity
1195300 - IT - EN - DE - FR
(10 x 6 x 2.5 m) in an insulated apartment. In this case, it is necessary to have 150 m
3
Approximate combustion value
Unit kcal/h
kg 3600
kg 1850
kg 4000
kg 4800
kg 7700
kg 6780
m 7800
3
L 8500
kW/h 860
Picture 6 at page
.
3
Required quantity in relation to 1 kg of dry
kW
4.2
2.2
5.0
5.6
8.9
7.9
9.1
9.9
1.0
41.
(for
3
3
wood
1,00
1,95
0,84
0,75
0,47
0,53
0,46
0,42
4,19
21